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Unmanned _ Mars Express & Beagle 2 _ New Hrsc Images Up

Posted by: tedstryk Jan 21 2005, 02:53 PM

Pretty highres stuff though.

Posted by: MizarKey Jan 21 2005, 06:56 PM

QUOTE (tedstryk @ Jan 21 2005, 06:53 AM)

Pretty highres stuff though.

If you're talking about the images of Claritas Fossae, they did put hi-res images up. The 3d anaglphy is amazing! Those craters look so cool...and the ridges that show three levels of depth...breathtaking!

Well done ESA! No just post more images per month...

Eric P / MizarKey

Posted by: tedstryk Jan 21 2005, 08:45 PM

The images are high quality, but with resolutions of 62 meters/pixel. They still have none of the advertized 2 meters/pixel stuff.

Posted by: bobik Jan 31 2016, 08:09 AM

Recently, Emily Lakdawalla posted a couple of from the Mars Express HRSC processed by Justin Cowart. One should note, however, that the is a laterally-inverted mirror image of the Martian north pole. Also the caption is not fully correct. Acidalia Planitia is not visible, but on the left-hand side (in our world, not through the looking-glass) is western Utopia Planitia, in the upper right-hand corner is the transition to Terra Sabaea, and around the northern polar cap extending southward on the right-hand side is Vastitas Borealis.

Posted by: jccwrt Feb 3 2016, 12:55 AM

Thanks for the spot. I can't do anything about the information on the blog at this point, but I will be sure to correct the image and update my location notes. The confusion came from using the raw HRSC images, which are mirror flipped for some reason. I must have flipped it twice without realizing it.

During 2013 and early 2014, MEX was performing a series of Phobos flybys and Deimos imaging sequences. During these flybys the spacecraft acquired up-close images of Phobos with the HRSC Super-Resolution channel, which is a 1024x1024px imager embedded in the HRSC's pushbroom system. The pointing isn't as smooth as HRSC, but using machi's deconvolution method I was able to increase the sharpness of these images greatly.

Here's a Phobos flyby on June 29, 2014 built from 6 SRC frames: by, on Flickr

The system has been used to make a good number of Kodak shots, too. by, on Flickr
(For some reason this one was stubbornly resistant to deconvolution, maybe stemming from the low S/N ratio of the original image?) by, on Flickr by, on Flickr

Posted by: Explorer1 Feb 3 2016, 01:07 AM

Fantastic work!
Also nice to see that Saturn is visibly much dimmer than Jupiter; makes perfect sense given the greater distance from our collective light source, but certainly a contrast with the usual illustrations that show all the planets in the same light when lined up.

Posted by: jccwrt Feb 7 2016, 12:56 AM

I found a couple of HRSC images of frost deposits in the southern hemisphere.

First one is some wilderness area in Terra Cimmera (I couldn't find a named feature for nearly a 100km in any direction)

And some heavy frost in Hooke Crater (located on the northern rim of the Argyre Basin)

Posted by: jccwrt Jul 16 2017, 10:12 PM

I've been experimenting more with processing high-altitude HRSC two-color (GB) limb scans. I want to emphasize that these aren't geometrically-controlled or accurate color images. Basically I warp the blue channel image to overlay the green channel image, then partially subtract the blue channel image from the green to come up with a synthetic red channel. Since there's a lot of along-track motion between images, the color of the atmospheric haze structure doesn't come out too well, so I either paint it a single color, or maybe paint individual layers if there's enough color information for it. The shape of the limb is distorted in the original images (usually one half will have a different slope than the other), and this is semi-subjectively adjusted so that the horizon fits the outline of a circle of an arbitrary radius while craters near the bottom of the image are more or less round. So don't wander off and try to use these for science tongue.gif

Posted by: jccwrt Dec 1 2018, 04:40 AM

A couple of global shots over Tharsis from the most recent public HRSC release:

Posted by: jccwrt Apr 3 2019, 02:21 AM

A couple of south polar views from December '14/January '15 that I stumbled on in the archives:

Posted by: jccwrt Sep 5 2019, 04:27 AM

Working on a new processing technique for the HRSC limb-scan images. Same process as above, but with a geometric warp (in Photoshop, Arc 80%, with an additional vertical warp component -8%) to account for the off-nadir viewing angle and wide viewing angle (~50 degrees of latitude) of the images. I'm liking the results I'm getting out of this, and I think they're more geometrically accurate (but still not controlled!) so I will likely go back to reprocess the previous limb scans I've worked with in the same way.

Posted by: antipode Sep 6 2019, 01:21 AM

Wow! Controlled or not that's eye-popping work, especially the last one.


Posted by: jccwrt Sep 7 2019, 09:24 PM

QUOTE (antipode @ Sep 5 2019, 08:21 PM) *
Wow! Controlled or not that's eye-popping work, especially the last one.


Thanks! I might have actually figured out a way to get better geometric control on these but still early in figuring out how to implement it.

Reprocessed the image of Aonia Terra that I posted further up the page with my new pipeline before the idea for getting better control clicked; this will probably be the last one of these for a while while I try to develop that. Absolutely spectacular view of Argyre (when isn't it spectacular?), and a not-bad view of winter hoarfrosts deposited all around Lowell Crater.

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